METHOD OF OBTAINING TITANIUM ALLOY INGOTS Russian patent published in 2018 - IPC C22F1/18 C22C1/02 C22B9/22 

FIELD: metallurgy.

SUBSTANCE: invention relates to the field of metallurgy, in particular to methods for smelting ingots of an alloy based on titanium doped with tantalum, hafnium and chrome, in order to obtain high-strength, heat-proof and heat-resistant products from it, which are mainly used in aerospace engineering. Method of producing ingots of an alloy based on titanium, containing, wt.%: tantalum 16–25, hafnium 7–15, chromium 3–6.5, zirconium 0.01–0.05, oxygen 0.01–0.03, carbon 0.01–0.05, nitrogen 0.008–0.02, hydrogen ≤0.005, titanium – the rest, including melting of double ligatures (Ti + Hf) and (Ta + Hf), preparation of the mixture containing double ligatures (Ti + Hf) and (Ta + Hf) and technically pure titanium and chromium, melting of the prepared mixture by the method of electron-beam melting in vacuum with subsequent adjustment of the number of alloying elements in the melted ingots of remelted ligatures. Consumable electrode is formed by overlapping the obtained ingots and welding them by the method of electron beam welding, then a double electron beam remelt of the consumable electrode in vacuum to produce ingots of an alloy based on titanium of a given composition, and then homogenizing annealing of ingots in vacuum are carried out.

EFFECT: required ductility of the alloy during hot and cold pressure treatment is ensured, which allows to carry out deformation of the ingot without cracking.

5 cl, 1 dwg, 5 tbl